The sysfs configuration interface of batman-adv to add/remove soft-interfaces is not deadlock free and doesn't follow the currently common way to create new virtual interfaces.
An additional interface though rtnl_link is introduced which provides easy device creation/deletion with tools like "ip":
$ ip link add dev bat0 type batadv $ ip link del dev bat0
Signed-off-by: Sven Eckelmann sven@narfation.org --- net/batman-adv/main.c | 2 ++ net/batman-adv/main.h | 1 + net/batman-adv/soft-interface.c | 9 +++++++++ net/batman-adv/soft-interface.h | 1 + 4 files changed, 13 insertions(+)
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c index f65a222..9b180a1 100644 --- a/net/batman-adv/main.c +++ b/net/batman-adv/main.c @@ -70,6 +70,7 @@ static int __init batadv_init(void) batadv_debugfs_init();
register_netdevice_notifier(&batadv_hard_if_notifier); + rtnl_link_register(&batadv_link_ops);
pr_info("B.A.T.M.A.N. advanced %s (compatibility version %i) loaded\n", BATADV_SOURCE_VERSION, BATADV_COMPAT_VERSION); @@ -80,6 +81,7 @@ static int __init batadv_init(void) static void __exit batadv_exit(void) { batadv_debugfs_destroy(); + rtnl_link_unregister(&batadv_link_ops); unregister_netdevice_notifier(&batadv_hard_if_notifier); batadv_hardif_remove_interfaces();
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h index 2f85577..605b125 100644 --- a/net/batman-adv/main.h +++ b/net/batman-adv/main.h @@ -148,6 +148,7 @@ enum batadv_uev_type { #include <linux/percpu.h> #include <linux/slab.h> #include <net/sock.h> /* struct sock */ +#include <net/rtnetlink.h> #include <linux/jiffies.h> #include <linux/seq_file.h> #include "types.h" diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index 68832f5..fcb510e 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -533,6 +533,8 @@ struct net_device *batadv_softif_create(const char *name) if (!soft_iface) return NULL;
+ soft_iface->rtnl_link_ops = &batadv_link_ops; + ret = register_netdevice(soft_iface); if (ret < 0) { pr_err("Unable to register the batman interface '%s': %i\n", @@ -567,6 +569,13 @@ int batadv_softif_is_valid(const struct net_device *net_dev) return 0; }
+struct rtnl_link_ops batadv_link_ops __read_mostly = { + .kind = "batadv", + .priv_size = sizeof(struct batadv_priv), + .setup = batadv_interface_setup, + .dellink = batadv_softif_destroy, +}; + /* ethtool */ static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { diff --git a/net/batman-adv/soft-interface.h b/net/batman-adv/soft-interface.h index fe9b0f7..5eecc6e 100644 --- a/net/batman-adv/soft-interface.h +++ b/net/batman-adv/soft-interface.h @@ -28,5 +28,6 @@ struct net_device *batadv_softif_create(const char *name); void batadv_softif_destroy(struct net_device *soft_iface, struct list_head *head); int batadv_softif_is_valid(const struct net_device *net_dev); +extern struct rtnl_link_ops batadv_link_ops;
#endif /* _NET_BATMAN_ADV_SOFT_INTERFACE_H_ */